Abstract: Insecticidally active vinyl-cyclopropane carboxylic acid esters of the formula ##STR1## are prepared by reacting ##STR2## in which R.sup.12 is a radical selected from the group consisting of ##STR3## with an alcoholate of the formulaM--O--R.sup.8.Various processes for making the intermediates are also described. Many of the intermediates and end products are new.

Abstract: A process for the preparation of a diacylated 4-imidazolin-2-one of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, optionally substituted alkyl, cycloalkyl, aryl and alkoxy, which comprises contacting a compound of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the previously assigned significance with a source of chlorine at a temperature from 20.degree. to 150.degree. C. in the presence of a radical forming agent or under ultra-violet light and thereafter dehydrohalogenating or dehalogenating the resultant chlorinated product.The diacylated 4-imidazolin-2-ones prepared by the process are useful for photochemical cycloadditions and as intermediates for the preparation of compounds in the biotin series.

Abstract: Insecticidally active vinyl-cyclopropane carboxylic acid esters of the formula ##STR1## are prepared by reacting ##STR2## in which R.sup.12 is a radical selected from the group consisting of ##STR3## with an alcoholate of the formulaM--O--R.sup.8.Various processes for making the intermediates are also described. Many of the intermediates and end products are new.

Abstract: Halogenovinyl-substituted tetrahydrofuran-2-ones of the formula ##STR1## are prepared by reacting a peracid such as peracetic, perpropionic or m-chloroperbenzoic acid with a halogenvinyl-substituted cyclobutanene of the formula ##STR2## in which R.sup.1 to R.sup.8 can be hydrogen, halogen, cyano or various organic radicals, or in pairs can make up a ring. Products wherein R.sup.3 is not hydrogen or R.sup.1 is not halogen are new. The products are useful as intermediates in making insecticides.

Abstract: 1,2-Halohydrincarboxylic acid esters of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are identical or different and represent hydrogen, cyano and optionally substituted alkyl, alkenyl, aralkyl, aryl, alkoxycarbonyl, acyloxy, alkoxy and aryloxy, and furthermoreR.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4, or R.sup.1 and R.sup.3 and/or R.sup.2 and R.sup.4 can be linked, forming a ring with the carbon atoms to which they are bonded;R.sup.5 represents hydrogen and optionally substituted alkyl, alkenyl, aralkyl, aryl, alkoxy and alkoxycarbonyl andX represents fluorine, chlorine, bromine and iodine; a process for preparing such 1,2-halohydrincarboxylic acid esters by reacting a cyclobutane-cis-1,2-diol of the formula ##STR2## with an orthoester of the formula ##STR3## wherein R.sup.1 -R.sup.5 have the previously ascribed significance and R.sup.6 -R.sup.

Abstract: A process for the preparation of a diacylated 4-imidazolin-2-one of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, optionally substituted alkyl, cycloalkyl, aryl and alkoxy, which comprises contacting a compound of the formula of II ##STR2## wherein R.sup.1 and R.sup.2 of the previously assigned significance with a source of chlorine at a temperature from 20.degree. to 150.degree. C. in the presence of a radical forming agent or under ultra-violet light and thereafter dehydrohalogenating or dehalogenating the resultant chlorinated product the diacylated 4-imidazolin-2-ones prepared by the process are useful for photochemical cycloadditions and as intermediates for the preparation of compounds in the biotin series.

Abstract: Halogenovinyl-substituted tetrahydrofuran-2-ones of the formula ##STR1## are prepared by reacting a peracid such as peracetic, perpropionic or m-chloroperbenzoic acid with a halogenvinyl-substituted cyclobutanone of the formula ##STR2## in which R.sup.1 to R.sup.8 can be hydrogen, halogen, cyano or various organic radicals, or in pairs can make up a ring.Products wherein R.sup.3 is not hydrogen or R.sup.1 is not halogen are new. The products are useful as intermediates in making insecticides.

Abstract: A process for the preparation of a cyclobutanone of the formula ##STR1## in which R.sup.1 to R.sup.6 each independently is a hydrogen, halogen, cyano, alkoxy, alkoxycarbonyl, carboxamido, dialkylphosphono, alkyl, cycloalkyl, aryl, aralkyl or alkenyl radical, or two of them together with the carbon atom to which each is linked form a ring,comprising reacting an N,N-disubstituted carboxylic acid amide of the formula ##STR2## in which R.sup.7 and R.sup.8 each independently is an alkyl, cycloalkyl, alkenyl, aryl or aralkyl radical or together form a ring, with an inorganic acid halide, and then reacting the product with a tertiary amine, an olefin of the formula ##STR3## and a Lewis acid, and subsequently hydrolyzing the mass. Preferably isobutyric acid dimethylamide is employed as the carboxylic acid amide, phosgene is employed as the inorganic acid halide, triethylamine is employed as the tertiary amine and zinc chloride or titanium tetrachloride is employed as the Lewis acid.

Abstract: Compounds having the formula ##STR1## wherein R is hydrogen or an acyl radical are prepared by chlorinating 3-acyl-oxazolidin-2-ones, followed by dehydrochlorination and optionally by saponification and reacylation. The compounds are useful as starting material for substitution and addition reactions and as vinyl monomers in homo- and copolymerizations, whereby oxazolidin-2-one rings containing polymers are formed. These polymers can be used as antistatic agents, dyeing auxiliaries and ion exchangers.